" lorsque le pilote automatique se déconnecte, un gradient de vent latéral concomitant (20 kt en 4 s) engendre le départ de l’avion en roulis à droite ;" so we do know the source of the uncommanded roll. Fig 64 of the French version shows a simulation of what the lateral response of the aircraft to this turbulence would have been with and without the actual pilot input. Note that this data does not exist in the English version.
What did Robert know, and when did he "know" it?
Do you have an opinion on the Trimmable Horizontal Stabilizer cycling "Full Nose Up" but only reaching -13.2 degrees? Is there any chance that the jackscrew got stuck short? Any chance of an "Alaskan" type fatal Pitch?